95 Ford F50, ABS light is on. Fuse 18 contiues to be blown, I have changed bulbs, abs/speed sensor and brake light switch. After changing the brake light switch it did take about an hour to blow fuse95 Ford F50, ABS light is on. Fuse 18 contiues to be blown, I have changed bulbs, abs/speed sensor and brake light switch. After changing the brake light switch it did take about an hour to blow fuse

6 Suggested Answers

You have a weak or bad ABS sensor on one of the hubs. They are built into the hub and are not individually replaceable. Also rust buildup around the sensor will cause this same problem. To stop the ABS from kicking in untill repair just pull the fuse.

most likely it is just a blown bulb.. and opening up a dash on the newer vehicles is a very tedius job... so unless you have like a full week end and another source of transportation i hate to admit but i would turn it over to a pro to do..lol... i have to admit it is kinda funny.. turn your car over to a shop... to change a light bulb...most likely a #194 bulb...

Just went through this problem with my Dakota as well. This is a very very very common problem with the Dodges. First things first. Replace the Vehicle Speed Sensor on the rear differential. Cost around 40 dollars at your local auto parts store or even from the stealership. Its easy to change as well one nut and off comes the bracket then the stud comes off and then you can take out the sensor. They big key is here to be VERY careful pulling out the sensor or you will break it off in the housing. You will need to slowly turn and pry it out with a small screwdriver (as there is an Oring holding it in). Reverse the process to install the new one. After you get the sensor in, reset everything by pulling the negative off the battery and leaving it off for 30 min (some require less time but 30 min is safe) to ensure all is reset. Hope this helps you.

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ABS light tells you that there is some problem with the brake system like you have forgot to release the emergency brake or its time for you to change the brake fluid. Ford recommends to change the brake fluid every year.If you have recently refilled the brake fluid , check for any leaks.Abs light indicates that your braking system needs to be serviced.

Its under the hood on the drivers side. If your looking for it because the ABS, Brake light are on and possibly the speedometer doesn't work then thats because the ABS module failed and codes will be stored in order to diagnose it. But if the ABS relay and the fuse are ok then usually this points to a failed ABS module. Check out modulemaster.com if you decide this is the case and want to rebuild it for hundreds less than a dealer replacement.

I would pull the fuse for the ABS hydraulic pump and then put it back in and see what happens. Don't ever recall a pump running. Dealer may need to hook up scan tool for diagnostic fault codes, DTCs.

Principles of Operation
The ABS control module receives wheel speed readings from both front wheel speed sensors and the rear differential speed sensor, and processes this information to determine if an ABS event is necessary. The wheel speed sensor electrically senses each tooth of the ABS sensor indicators as it passes through the wheel speed sensor's magnetic field.
The ABS control module continuously monitors and compares the rotational speed of each wheel speed sensor indicator and, when it detects an impending wheel lock, modulates brake pressure to the appropriate brake caliper(s). This is accomplished by triggering the hydraulic control unit (HCU) to open and close the appropriate solenoid valves. Once the affected wheel returns to normal speed, the ABS control module returns the solenoid valves to their normal position, and normal (base) braking resumes.
The ABS control module is self-monitoring. When the ignition switch is turned to the RUN position, the ABS control module will do a preliminary electrical check, and at approximately 20 km/h (12 mph), the pump motor is turned on for approximately one-half second. Any malfunction of the ABS system will cause the ABS to shut off; normal power assisted braking, however, remains. Inspection and Verification — Scan Tool Communications Check

Verify the customer concern by carrying out the Drive Cycle Test.

Visually inspect for obvious signs of mechanical and electrical damage.

Visual Inspection Chart
Mechanical
Electrical

Parking brake cable

Tire pressure

Tire size or mismatched tires

Blown fuse

Central junction box (CJB):

fuse 23 (10A)

Battery junction box

fuse 102 (50A)

Connectors or connections

Ground integrity

Harness routing

Wire chafing

Circuitry open/shorted

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Anti-Lock Control
The four-wheel anti-lock brake system (4WABS) consists of the following components:

Sounds like he may have blown the brake light fuse while messing with the bulb. Make sure the correct bulb is installed. It should be a double filament bulb not a single.The wrong bulb will blow the fuse.The shift lock solenoid uses the brake light switch to unlock.The ABS code will be for the brake light system and will clear itself when the power is restored to the brake light switch.

It could be that changing the switch told the ABS there was a fault. Try removing the fuse for the ABS and waiting 5 minutes for it to reset. ---I had a small ABS issue with my Volvo and the ABS fuse had blown. Good luck-- and if this helped can you give a rating?